Spike-tooth harrow.



No. 7o|,735. Patented June 3, I902. T. muons.

SPIKE TOOTH NARROW.

(Appliebtion filed Jun. 0, 1909.)

(No Model.)

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UNITED STATES PATENT @EEIcE.

THOMAS D. JONES, OF SYRACUSE, NEW YORK.

SPIKE-TOOTH HARROW.-

SPEOIFIGATION forming part of Lett ers ]?atent No. 701,735, dated June 3, 1902. Original application filed AugustlZ, 1901, Serial No. 71,700. Divided and this application filed January 6, 1902. Serial "To all whom, it may concern.-

Be it known that I, THOMAS D. JONES, of

, Syracuse,in the county of Onondaga and State of New York, have invented a certain new and useful Spike-Tooth Harrow, of which the following is a specification.

This application is a division of my prior application, Serial No. 71,700,.filed August 12, 1901, upon. which my Patent No. 691,388 issued January 21, 1902, and the invention set forth therein, and has for its object the production of a spike-tooth harrow which is simple in construction, economical in manufacture, and highly strong, durable, and efficient in use; and to this end said invention consists in the devices and combinations hereinafter set forth and claimed.

Figure 1 is an elevation of a portion of a spike-tooth harrow embodying my invention. Fig. 2 is a vertical sectional View taken on line 2 2, Fig. 1.

My harrow consists of a frame and spike teeth.

The frame, only a part of which is here illustrated, is composed of a plurality of frame-bars A of any suitable construction, which, as is obvious to those skilled in the art, are normally fixed during the operation of the harrow. Said frame-bars are each provided with substantially upright apertures a, a substantially flat normally lower face a, a substantially flat and upright side face a formed with a lengthwise channel a and an opposite side face provided with a lower sur-- face a curving or otherwise extending upwardly at an angle from the contiguous part of said lower face. The frame-bars A are thus substantially U-shaped in cross-section and are arranged with their lengthwise channels opening from corresponding sides instead of their tops.

The spike-teeth B are secured at intervals to the frame-bars 'A. The lower portions of said teeth are formed with front and rear diverging substantially upright faces Z9, and their upper portions are provided with shoulders b and attaching ends or shanks b Said shoulders I) are integral with the main bodies of the spike-teeth, extend laterally,forwardly, and rearwardly beyond the underlying portions of the teeth, are each formed with a subapertures ct.

sition.

(No model.)

stantially flat intermediate part 11 engaged with and substantially. closely fitting the lower face a of the corresponding frame-bar, and are also formed with forward and rearward parts I) b of unequal length, the shorter one, 12 of said forward and rearward parts being substantially upright and engaged with and substantially closely fitting the flat and upright side face a of the corresponding frame-bar and the longer one, I), of said forward and rearward parts being extended or curved upwardly and engaged with and sub* stantially closely fitting said surface 0. of the opposite side face of said frame-bar. The attaching ends or shanks 11 rise above the shoulders b in planes substantially coincident with the lengthwise planes of the underlying portions of the teeth- B and are arranged in the As clearly seen in Fig. 2, the upper extremities of the attaching ends or shanks 19 project above the frame-bars A and are provided with nuts I), adjustable lengthwise thereon toward the upper faces of the frame-bars for securing the spike-teeth in po- Suitable nut-locks b are interposed between the frame-bars A and the nuts I) and are provided with arms, respectively, engaged with said frame-bars and nuts for preventing turning of the nuts.

Spike-teeth of the construction described are readily drop-forged or otherwise manufactured at minimum cost, are easily secured in position, are not readily broken, especially at the bases of their attaching ends, greatly facilitate the support of the barrow-frame, owing to the construction of their integral shoulders I) and the close engagement thereof with the contiguous surfaces of the framebars, and may be reversed at will by partly unscrewing the nuts and turning the teeth half-way around.

My harrow will be readily understood upon reference to the foregoing description and the accompanying drawings, and it will be obvious to those skilled in the art that more or less change may be made in the construction and arrangement of its component parts without departing from the spirit of my invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is'-- 1. In aspike-tooth harrow, the combination of a frame-bar having a substantially fiat normally lower face, a substantially flat and upright side face formed with a lengthwise channel, and an opposite side face provided with a lower surface extending upwardly at an angle from the contiguous part of said lower face; with a spike-tooth having its upper portion provided with an attaching end passed through the frame-bar, said upper portion being also provided with an integral shoulder having a substantially flat intermediate part and upwardly-extending forward and rearward parts respectively engaged with and substantially closely fitting said lower and opposite side faces of the frame-bar, substantially as and for the purpose described.

2. In a spike-tooth harrow, the combination of a ham e-bar having a substantially flat normally lower face, a substantially flat and uprightside face formed with a lengthwise channel, and an opposite side face provided with a lower surface curving upwardly from the contiguous part of said lower face; with a spike-tooth havingits upper portion provided with an attaching end passed through the frame-bar, said upper portion being also provided with an integral shoulder extending laterally, forwardly and rearwardly beyond the underlying portion of the spike-tooth, the intermediate part of the shoulder being engaged with and substantially closely fitting the lower face of the frame-bar and the forward and rearward parts of the shoulder being of unequal height, the shorter oneof said forward and rearward parts being substantially upright and engaged with the substantially fiat and upright side face of the framebar, and the longer one of said forward and rearward parts being curved upwardly and engaged with said curving surface of the 0pposit-e side face of the frame-bar, substantially as and for the purpose specified.

In testimony whereof I have hereunto signed my name, in the presence of two attesting witnesses, at Syracuse, in the county of Onondaga, in the State of New York, this 28th day of December, 1901.

THOMAS D. JONES.

YVitnesses:

D. LAVINE, S. DAVIS. 

